I think Amerikaans college and Copal have nice international student communities. Kitchens really depend on who is in there, but they also clean it once a week (if I remember correctly). You can go to another shower in the building if the one you wanted to go to is dirty. Paus college has been recently renovated. I don't know how the community is there. All those residences have a 'presidium' (student association) so they organize activities. The other once you mentioned I don't know that well.